/*
 * Buffered file io for ffmpeg system
 * Copyright (c) 2001 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "avformat.h"
#include <fcntl.h>
#ifndef CONFIG_WIN32
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#else
#include <io.h>
#define open(fname,oflag,pmode) _open(fname,oflag,pmode)
#endif /* CONFIG_WIN32 */

#if defined(CONFIG_FIO_BUFFER)
#include "fio_buffer.h"
static int b_use_fio_thread = 0;
#endif

/* standard file protocol */

static int file_open(URLContext *h, const char *filename, int flags)
{
    int access;
    int fd;

    strstart(filename, "file:", &filename);

    if (flags & URL_WRONLY) {
        access = O_CREAT | O_TRUNC | O_WRONLY;
    } else {
        access = O_RDONLY;
    }
#if defined(CONFIG_WIN32) || defined(CONFIG_OS2)
    access |= O_BINARY;
#endif
    fd = open(filename, access, 0666);
    if (fd < 0)
        return -ENOENT;

#if defined(CONFIG_FIO_BUFFER)
    if(flags == URL_RDONLY){
	    h->priv_data = (void *)fd;
	    b_use_fio_thread = 0;
    }
    else{
	    h->priv_data = (void *)fio_alloc();
	    if(!h->priv_data) {
		    close(fd);
		    return -ENOMEM;
	    }
	    ((struct fio_info*)(h->priv_data))->fd = fd;
	    b_use_fio_thread = 1;
    }
#else
    h->priv_data = (void *)fd;
#endif
    return 0;
}

static int file_read(URLContext *h, unsigned char *buf, int size)
{
	int fd;
#if defined(CONFIG_FIO_BUFFER)
	if(b_use_fio_thread){
		fd = ((struct fio_info*)(h->priv_data))->fd;
		fio_wait_write_stop_and_pending((struct fio_info*)(h->priv_data));
	}
	else
		fd = (int)h->priv_data;
#else
	fd = (int)h->priv_data;
#endif
    return read(fd, buf, size);
}

static int file_write(URLContext *h, unsigned char *buf, int size)
{
	int fd;
#if defined(CONFIG_FIO_BUFFER)
	if(b_use_fio_thread)
		return fio_write((struct fio_info*)h->priv_data, buf, size);
	else{
		fd = (int)h->priv_data;
		return write(fd, buf, size);
	}
#else
	fd = (int)h->priv_data;
	return write(fd, buf, size);
#endif
}

/* XXX: use llseek */
static offset_t file_seek(URLContext *h, offset_t pos, int whence)
{
    offset_t ret = 0;
    int fd;
#if defined(CONFIG_FIO_BUFFER)
    if(b_use_fio_thread){
	    fd = ((struct fio_info*)(h->priv_data))->fd;
	    fio_wait_write_stop_and_pending((struct fio_info*)(h->priv_data));
    }
    else
	    fd = (int)h->priv_data;
#else
    fd = (int)h->priv_data;
#endif

#ifdef CONFIG_WIN32
    ret =  _lseeki64(fd, pos, whence);
#else
    ret = lseek(fd, pos, whence);
#endif

#if defined(CONFIG_FIO_BUFFER)
    if(b_use_fio_thread)
	    fio_trigger_write((struct fio_info*)(h->priv_data));
#endif
    return ret;
}

static int file_close(URLContext *h)
{
    int fd;
#if defined(CONFIG_FIO_BUFFER)
    if(b_use_fio_thread){
	    struct fio_info *io_info = h->priv_data;
	    fd = io_info->fd;
	    fio_free(io_info);
    }
    else
	    fd = (int)h->priv_data;
#else
    fd = (int)h->priv_data;
#endif
    return close(fd);
}

URLProtocol file_protocol = {
    "file",
    file_open,
    file_read,
    file_write,
    file_seek,
    file_close,
};

/* pipe protocol */

static int pipe_open(URLContext *h, const char *filename, int flags)
{
    int fd;

    if (flags & URL_WRONLY) {
        fd = 1;
    } else {
        fd = 0;
    }
    h->priv_data = (void *)fd;
    return 0;
}

static int pipe_read(URLContext *h, unsigned char *buf, int size)
{
    int fd = (int)h->priv_data;
    return read(fd, buf, size);
}

static int pipe_write(URLContext *h, unsigned char *buf, int size)
{
    int fd = (int)h->priv_data;
    return write(fd, buf, size);
}

static int pipe_close(URLContext *h)
{
    return 0;
}

URLProtocol pipe_protocol = {
    "pipe",
    pipe_open,
    pipe_read,
    pipe_write,
    NULL,
    pipe_close,
};
